Sliding contact fracture of dental ceramics: Principles and validation

Linlin Ren, Yu Zhang

Research output: Contribution to journalArticlepeer-review


Ceramic prostheses are subject to sliding contact under normal and tangential loads. Accurate prediction of the onset of fracture at two contacting surfaces holds the key to greater long-term performance of these prostheses. In this study, building on stress analysis of Hertzian contact and considering fracture criteria for linear elastic materials, a constitutive fracture mechanics relation was developed to incorporate the critical fracture load with the contact geometry, coefficient of friction and material fracture toughness. Critical loads necessary to cause fracture under a sliding indenter were calculated from the constitutive equation, and compared with the loads predicted from elastic stress analysis in conjunction with measured critical load for frictionless normal contact - a semi-empirical approach. The major predictions of the models were calibrated with experimentally determined critical loads of current and future dental ceramics after contact with a rigid spherical slider. Experimental results conform with the trends predicted by the models.

Original languageEnglish (US)
Pages (from-to)3243-3253
Number of pages11
JournalActa Biomaterialia
Issue number7
StatePublished - Jul 2014


  • Dental ceramics
  • Friction
  • Functionally graded ceramics
  • Sliding contact fracture
  • Toughness

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Biochemistry
  • Biomedical Engineering
  • Molecular Biology


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